Tag Archive: bash

Data to S3 with command line and encryption

This article details how to archive folders with their contents, encrypt the archives, upload them to S3, and remove the local copies.  A typical usage might be to archive the version of a website that I have with twenty thousand files on a certain date before changing the folder layouts of images for ten thousand images.

Yum update memory allocation issues

Yum Update Memory Allocation issues on 512M Virtual Machines: Create a Swap file: dd if=/dev/zero of=/swapfile bs=1024 count=655366 chmod 600 /swapfile mkswap /swapfile swapon /swapfile To disable and remove after updates are complete: swapoff -a rm -f /swapfile

High Quality compressed HPLIP scans

HPLIP produces scans far better than what I can accomplish on Windows, even with Adobe Acrobat Standard.  The Auto Document Feeder scans in 8.3 megapixel png files, and then hplip converts them to a multiple-page PDF of extremely high quality.  This is great for one page documents, but for 10 or 12 page documents, such as faxes, the file size becomes a problem due to email limitations.  Ghostscript can…
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Compressing PDFs in Bash

I have scripts for hplip to scan PDF’s to folders using the ADF. These PDFs are very large. To convert these to smaller file-sizes for emailing, I added the following functions to .bashrc. mediumpdf() { read -p “Enter input PDF filename: ” name \ && gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 \ -dPDFSETTINGS=/printer -sOutputFile=medium-quality-$name $name; } smallpdf() { read -p “Enter input PDF filename: ” name \ && gs -dNOPAUSE…
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Zip files and UUID from Bash

Two quick items for .bashrc.  The archive command takes a folder name and zips its contents.  The UUID produces a unique number easily. archive() { read -p “Enter folder name: ” name && zip -rv9 $name-$(\ date +”%Y-%m-%d-%H%M%p”).zip $name; } uuid() { UUID=$(cat /proc/sys/kernel/random/uuid) && echo $UUID; }

Timezone and .bashrc

Changing the timezone on a Linux system and setting console colors with the echo command.